Maybe I am dumb but I just don't understand BMI. According to webmd my son is obese. I have posted about this weight before but briefly he is almost 8, 4'3 and weighs 76lbs. He has always been a big boy (95th percentile since he was born). His Dr and I have discussed his weight many times and keep a close eye on it. He eats very well, hardly any candy, snacks, soda etc. he is very active and plays sports all year long. But anyways I don't believe he is obese. His belly is large and his face is chubby but his arms and legs are solid and a bit thick (for lack of a better word). When I think obese I think very large, multiple chins, etc..... (This is not a dig on anyone who is obese!) So how much truth does the bmi calculator hold? His bmi is 20.5 and I do know he is overweight so I am not saying he is thin at all. I will post more pictures in replies.